GitApplication · Jenkins
CVE-2020-2136
Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.
NVD · uneditedJenkins Git Plugin 4.2.0 and earlier does not escape the error message for the repository URL for Microsoft TFS field form validation, resulting in a stored cross-site scripting vulnerability.
Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.
dbcve analysis · high confidenceJenkins Git Plugin 4.2.0 and earlier contains a stored cross-site scripting (XSS) vulnerability where the error message for the repository URL field in Microsoft TFS form validation does not properly escape user-supplied input, allowing injection of malicious scripts that execute in the browsers of other users viewing the error message.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.
NVD · CPE data
GitApplication
<= 4.2.0CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.
From the vector- Attack vector
- Network
- Complexity
- Low
- Privileges
- Low
- User interaction
- Required
- Scope
- Changed
- Confidentiality
- Low
- Integrity
- Low
- Availability
- None
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.
dbcve checksWork through these to decide whether this CVE applies to you.
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Identify Jenkins Git Plugin versionNavigate to Manage Jenkins > Manage Plugins > Installed tab and locate the Git plugin, or use the Jenkins CLI: java -jar jenkins-cli.jar -s http://[jenkins-url] list-plugins | grep -i gitAffected if Git plugin version is 4.2.0 or earlier
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Determine if TFS/Team Foundation Server integration is in useLook for TFS-related configuration in job configurations or global Jenkins settings under the Git plugin parameters. Search for any TFS or Team Foundation Server repository URL configurations.Affected if TFS repository URL field is configured or accessible in Jenkins job or system configuration
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Inspect the TFS repository URL validation error handlingTrigger the TFS repository URL validation by entering a URL in a job's Git configuration when using TFS/Team Foundation Server as the source control, or check for any stored error messages related to TFS URL validation in build logs or configuration pages.Affected if Error messages for TFS repository URL validation are displayed without proper escaping of user-supplied input
You are affected if your Jenkins Git Plugin version is 4.2.0 or earlier AND you have TFS/Team Foundation Server integration configured where repository URL validation error messages can be triggered.
Generated from the published advisory. Verify against your own configuration.
Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.
From vendor dataUpgrade Jenkins Git Plugin to version 4.2.1 or later which properly escapes the error message content for the TFS repository URL validation field.
Fix this in Git
Scoped from the published advisory
- Consultation2.0 h
- Implementation1.0 h
- Testing2.0 h
- Review / QA1.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $1,696.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2020-2136 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.
References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.
Primary sourcesPractitioner notes
ContributedPeer-ranked notes from engineers who’ve handled CVE-2020-2136 in production — separate from our analysis above.
The advisory tells you what broke. It rarely tells you what actually worked. If you’ve dealt with this one, that detail is what the next engineer is searching for.
- The version that genuinely resolved it — not the one the vendor claimed
- A config change or rule that shut the vector down
- A gotcha in the upgrade path that cost you an afternoon
No notes yet
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- Verified mitigations, workarounds, and config changes
- Version or environment caveats, and links to real fixes
- No weaponised exploit code, or anything meant to cause harm
- No spam, self-promotion, credentials, or personal data